4 months on and finally a warning about the pads on my dashboard.
To be honest - waiting for a warning light is leaving it too late. You could have been in the middle of a cross Europe holiday - well ok not this year!!
Was it fitted with MB parts and was this shown as such on the invoice? - presumably at 2 1/2 years old you are still under the original manufactures warranty.
My local Indy has mentioned they have seen a spate of premature failures of things like disks and batteries due to lockdowns since last march.
Edited by Big John on 18/04/2021 at 20:38
|
|
Very confused here.
4 months ago you said
Dealership have told me I need to replace both the pads and disks on my front wheels, at a cost of around £500
But now you have said
took it to an Independent company who fitted Mercedes pads at a fraction of the cost the dealer had quoted me. Also confirmed that the disks wont need replaced until I need another set of pads (at the earliest). Saved myself over £800!
So to summarise the MB dealer wanted to charge you £500 for discs and pads yet your local indy has save you £800 by just fitting pads.
How on earth does that work? did they give you £300?
|
|
I think the OP was saying that MB also wanted to replace the rears shortly...
Moreexpense..
|
|
If the MB dealership was giving the OP the real facts the front discs were already below the allowable limit but have not been replaced by the Indy. In another 27,000 miles they will be potentially dangerous.
The MB dealership marked the rears as "amber" which in my experience (from other brands) means nothing needs doing before the next scheduled service.
|
|
Did MB give a written indication of the front disk measurements? If the disk thickness has miraculously now increased, report them to trading standards.
|
|
Whilst I appreciate that manufacturers have to place thickness tolerances on brake discs there must be a million cars or more running well outside these. Does anyone know of any instance where the discs have actually failed ie cracked or completely collapsed?
|
Whilst I appreciate that manufacturers have to place thickness tolerances on brake discs there must be a million cars or more running well outside these. Does anyone know of any instance where the discs have actually failed ie cracked or completely collapsed?
Never known disc failure but have known them to suffer brake fade, and on some the disc can warp if they become too thin.
some wait till the pads need changing when they should have had the discs replaced at the same time, but wait till new pads wear right to limit and beyond before doing the lot which is not a good idea for safety
|
Does anyone know of any instance where the discs have actually failed ie cracked or completely collapsed?
www.youtube.com/watch?v=WPiRRiBqfAc
About three minutes in is a perfect example of a worn out disc. I've seen examples of completely detached discs on other videos from that contributor.
|
Does anyone know of any instance where the discs have actually failed ie cracked or completely collapsed?
www.youtube.com/watch?v=WPiRRiBqfAc
About three minutes in is a perfect example of a worn out disc. I've seen examples of completely detached discs on other videos from that contributor.
Yes, but that's in America - no strict and arguably overcautious MoT type checks and full of poor people running cars on a shoestring.
|
Does anyone know of any instance where the discs have actually failed ie cracked or completely collapsed?
www.youtube.com/watch?v=WPiRRiBqfAc
About three minutes in is a perfect example of a worn out disc. I've seen examples of completely detached discs on other videos from that contributor.
Yes, but that's in America - no strict and arguably overcautious MoT type checks and full of poor people running cars on a shoestring.
You mean it really is "The Land Of The Free"?
Damn! I'll have to review my rabid Anti Americani prejudice.
I hate that.
|
|
Does anyone know of any instance where the discs have actually failed ie cracked or completely collapsed?
Look on you tube, there's countless horror stories of mechanical failure and many of discs worn completely.
|
|
Do ventilated disks rot significantly from the inside?
Never had them that I recall, but I'd have thought it was likely.
If I had them I'd probably rust treat the insides, but that would be tricky so I'd guess no one bothers
|
Do ventilated disks rot significantly from the inside?
Never had them that I recall, but I'd have thought it was likely.
If I had them I'd probably rust treat the insides, but that would be tricky so I'd guess no one bothers
They do indeed rust but I have yet to hear of a disc fail because of it.
Treating the inside would be a waste of time. Whatever you used would soon burn off with the heat but more serious would be the problems created if any of the treatment got onto the disc face/pad. In that case a bit of rust would the the least of your worries as you careered off the road with no brakes.
|
Do ventilated disks rot significantly from the inside?
Never had them that I recall, but I'd have thought it was likely.
If I had them I'd probably rust treat the insides, but that would be tricky so I'd guess no one bothers
They do indeed rust but I have yet to hear of a disc fail because of it.
Treating the inside would be a waste of time. Whatever you used would soon burn off with the heat but more serious would be the problems created if any of the treatment got onto the disc face/pad. In that case a bit of rust would the the least of your worries as you careered off the road with no brakes.
That's why I said it would be tricky, but I reckon it could be done.
I treat the rims of my solid disks, which otherwise rust quite badly. The treatment is fairly persistent, though it should suffer from the same holocaust that you hypothesise if your hypothesis was correct
They don''t,.
Differences I can think of are
(a) poorer access, which is likely to make the treatment less effective, and would require some improvised gadgetry.
Improvised Gadgetry R US
(b) Bigger surface, which might mean more surplus :"stuff".got spun out onto the calipers. This could be addressed by giving it a lot of time to go off, and removing the calipers (or maybe just the pads) for a pre-spin.
(c) MAYBE the inside of a ventilated disk gets significantly hotter than the outside of solid disk, but if that;s the case ventilated disks seem a pretty b***** silly idea.
If I ever get one (well, two, hopefully) I'll let you know, assuming I survive careering off the road with no brakes
I did have temporary stewardship of a Honda Accord with them and treated the rims but only the bit of the slots I could easily get to. The owner hasn;t mentioned subsequently careening off the road with no brakes, but Taiwanese tend not to notice that kind of thing
forumosa-12829.kxcdn.com/uploads/default/original/...g
Edited by edlithgow on 22/04/2021 at 01:06
|
|
MAYBE the inside of a ventilated disk gets significantly hotter than the outside of solid disk, but if that;s the case ventilated disks seem a pretty b***** silly idea.
general idea of vented discs is that they don`t get hotter than solid discs which is why they usually last longer than solid discs and better braking, the silly idea is painting discs just to make them look good, as it certainly isnt going to make them last longer as the pads wear them down, not the rust, (in normal use anyway)
could never see the point of painting discs as they are there to do a job, not look nice, I would think paint would affect cooling as well ie the paint would slow the cooling effect down which you really do not want
|
Do ventilated disks rot significantly from the inside?
If I had them I'd probably rust treat the insides, but that would be tricky so I'd guess no one bothers
They do indeed rust but I have yet to hear of a disc fail because of it.
Treating the inside would be a waste of time.
I bother, and regard 'treating', i.e. derusting the insides as part of disc servicing. I use an old screwdriver which just fits down the holes of a ventilated disc. After about 50,000 miles (it was about 70K for the Audi), I bang off superfluous rust with a hammer, and bang the screwdriver down each of the holes which by this age (about ten years in our household) and mileage are choked with rust. Then I remove the lipping with a carborundum wheel. This is more easily done on the chocked car with the engine idling in gear and the disc rotating. High speed braking had become a bit 'juddery', and I cured it by applying the carborundum wheel to the business surface of the discs - a bit like honing a cylinder bore. This removes any invisible variation of the surface friction, commonly described as 'warped discs'. (Discs don't actually warp, obv.) Best to do this at the same time as renewing the pads.
|
Do ventilated disks rot significantly from the inside?
If I had them I'd probably rust treat the insides, but that would be tricky so I'd guess no one bothers
They do indeed rust but I have yet to hear of a disc fail because of it.
Treating the inside would be a waste of time.
I bother, and regard 'treating', i.e. derusting the insides as part of disc servicing. I use an old screwdriver which just fits down the holes of a ventilated disc. After about 50,000 miles (it was about 70K for the Audi), I bang off superfluous rust with a hammer, and bang the screwdriver down each of the holes which by this age (about ten years in our household) and mileage are choked with rust. Then I remove the lipping with a carborundum wheel. This is more easily done on the chocked car with the engine idling in gear and the disc rotating. High speed braking had become a bit 'juddery', and I cured it by applying the carborundum wheel to the business surface of the discs - a bit like honing a cylinder bore. This removes any invisible variation of the surface friction, commonly described as 'warped discs'. (Discs don't actually warp, obv.) Best to do this at the same time as renewing the pads.
I suppose internal de-rusting will improve cooling. Dunno to what extent it''ll slow further rusting, but not much, I;d have thought.
I use sunflower oil and aluminium on the rims, so I suppose I'd try to use it internally as well,
Not sure how, but some aluminium cable in a drill chuck might be worth a try.
There's also those phosphating treatments that "rust convert", Dunno how the black stuff stands up to heat, though.
Dunno either if I'd be able to find them here in Taiwan, but a solution made with the powder from a dry fire extinguisher seems to have a similar effect.
Edited by edlithgow on 23/04/2021 at 00:17
|
|
|
"Does anyone know of any instance where the discs have actually failed ie cracked or completely collapsed?"
Yes, I had a C-reg mk3 Escort XR3i in 1994, one day I braked and was met with a cracking noise from the front nearside wheel, and upon checking, the ventilated disk had come apart, i.e. imagine pulling an oreo cookie apart, with both halves just dangling there.
Got rid in 1995, always being broken into, always being pulled by the old bill, it leaked, the clutch quadrant plastic thing went,oill leaks, last Ford I had in fact, mainly Japanese for me since!
Edited by Sprice on 21/04/2021 at 18:12
|
"Does anyone know of any instance where the discs have actually failed ie cracked or completely collapsed?"
Yes, I had a C-reg mk3 Escort XR3i in 1994, one day I braked and was met with a cracking noise from the front nearside wheel, and upon checking, the ventilated disk had come apart, i.e. imagine pulling an oreo cookie apart, with both halves just dangling there.
Got rid in 1995, always being broken into, always being pulled by the old bill, it leaked, the clutch quadrant plastic thing went,oill leaks, last Ford I had in fact, mainly Japanese for me since!
It was common on those, which I forgot till you mentioned it- quadrants were always being replaced even the modded unit kept breaking, some even suffered seized wheel bearings and had to have whole hubs replaced because they broke up and/or melted the hub together !
|
|
I know my alternator seized too melting the belt, C240EUH was about 9 y/o when I bought it but nothing but hassle, looking at gov.uk it was scrapped in April 1998, silly thing is it would be worth a bit now, being a rare rosso red late mk 3 model. Anyway OP, sorry for the thread hijack
|
|
|
|
